diff --git a/pyproject.toml b/pyproject.toml
index 9787c3b..1e3e926 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,16 @@
 [build-system]
 requires = ["setuptools", "wheel"]
 build-backend = "setuptools.build_meta"
+
+[project]
+name = "simple_functions"  # 你的包名称
+version = "0.1.0"  # 包的版本
+description = "A package for simple math functions"
+authors = [{name = "Your Name", email = "your.email@example.com"}]
+license = {text = "MIT"}  # 包的许可证类型
+dependencies = ["numpy", "functools"]   # 运行时依赖
+readme = "README.md"  # 包含的 README 文件
+
+[tool.setuptools.packages.find]
+where = ["simple_functions"]
+
diff --git a/simple_functions.egg-info/PKG-INFO b/simple_functions.egg-info/PKG-INFO
new file mode 100644
index 0000000..1a97094
--- /dev/null
+++ b/simple_functions.egg-info/PKG-INFO
@@ -0,0 +1,3 @@
+Metadata-Version: 2.1
+Name: simple_functions
+Version: 0.1.0
diff --git a/simple_functions.egg-info/SOURCES.txt b/simple_functions.egg-info/SOURCES.txt
new file mode 100644
index 0000000..e3f4a65
--- /dev/null
+++ b/simple_functions.egg-info/SOURCES.txt
@@ -0,0 +1,12 @@
+README.md
+pyproject.toml
+setup.py
+simple_functions/__init__.py
+simple_functions/cacu_pi.py
+simple_functions/functions1.py
+simple_functions.egg-info/PKG-INFO
+simple_functions.egg-info/SOURCES.txt
+simple_functions.egg-info/dependency_links.txt
+simple_functions.egg-info/top_level.txt
+tests/test_constants.py
+tests/test_simple_functions.py
\ No newline at end of file
diff --git a/simple_functions.egg-info/dependency_links.txt b/simple_functions.egg-info/dependency_links.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/simple_functions.egg-info/dependency_links.txt
@@ -0,0 +1 @@
+
diff --git a/simple_functions.egg-info/top_level.txt b/simple_functions.egg-info/top_level.txt
new file mode 100644
index 0000000..a4ba85f
--- /dev/null
+++ b/simple_functions.egg-info/top_level.txt
@@ -0,0 +1 @@
+simple_functions
diff --git a/simple_functions/__init__.py b/simple_functions/__init__.py
index d613bea..ca0d3bd 100644
--- a/simple_functions/__init__.py
+++ b/simple_functions/__init__.py
@@ -1,4 +1,5 @@
-from .functions1 import *  # noqa
+from simple_functions.functions1 import my_sum, my_prod  # noqa
+from simple_functions.cacu_pi import pi, rsum
 
 try:
     from importlib.metadata import version, PackageNotFoundError  # Python 3.8+
diff --git a/simple_functions/__pycache__/__init__.cpython-312.pyc b/simple_functions/__pycache__/__init__.cpython-312.pyc
new file mode 100644
index 0000000..7af9776
Binary files /dev/null and b/simple_functions/__pycache__/__init__.cpython-312.pyc differ
diff --git a/simple_functions/__pycache__/cacu_pi.cpython-312.pyc b/simple_functions/__pycache__/cacu_pi.cpython-312.pyc
new file mode 100644
index 0000000..4770ac8
Binary files /dev/null and b/simple_functions/__pycache__/cacu_pi.cpython-312.pyc differ
diff --git a/simple_functions/__pycache__/functions1.cpython-312.pyc b/simple_functions/__pycache__/functions1.cpython-312.pyc
new file mode 100644
index 0000000..7af18c6
Binary files /dev/null and b/simple_functions/__pycache__/functions1.cpython-312.pyc differ
diff --git a/simple_functions/cacu_pi.py b/simple_functions/cacu_pi.py
new file mode 100644
index 0000000..d440fc8
--- /dev/null
+++ b/simple_functions/cacu_pi.py
@@ -0,0 +1,18 @@
+
+from numpy import sqrt
+from functions1 import factorial
+from functools import cache
+
+__all__ = ['pi']
+
+
+def pi(terms=1):
+    return 1./(2.*sqrt(2.)/9801.*rsum(terms))
+
+
+@cache  # 递归/重复调用时记得使用 @cache
+def rsum(n):
+    t = factorial(4*n)*(1103+26390*n)/(factorial(n)**4*396**(4*n))
+    return t + rsum(n-1) if n else t
+
+print(pi(100))
\ No newline at end of file
diff --git a/simple_functions/functions1.py b/simple_functions/functions1.py
index 8c63a4d..6e3363e 100644
--- a/simple_functions/functions1.py
+++ b/simple_functions/functions1.py
@@ -1,5 +1,8 @@
 
-__all__ = ['my_sum']
+from numpy import sqrt
+from functools import cache
+
+__all__ = ['my_sum', 'my_prod'] # module rsum 只是服务于计算pi，因此不需要导入
 
 
 def my_sum(iterable):
@@ -7,3 +10,13 @@ def my_sum(iterable):
     for i in iterable:
         tot += i
     return tot
+
+def my_prod(iterable):
+    result = 1
+    for i in iterable:
+        result *= i
+    return result
+
+@cache
+def factorial(n):
+    return n * factorial(n-1) if n else 1
\ No newline at end of file
diff --git a/simple_functions/simple_functions.egg-info/PKG-INFO b/simple_functions/simple_functions.egg-info/PKG-INFO
new file mode 100644
index 0000000..4e5e4fb
--- /dev/null
+++ b/simple_functions/simple_functions.egg-info/PKG-INFO
@@ -0,0 +1,12 @@
+Metadata-Version: 2.1
+Name: simple_functions
+Version: 0.1.0
+Summary: A package for simple math functions
+Author-email: Your Name <your.email@example.com>
+License: MIT
+Description-Content-Type: text/markdown
+Requires-Dist: numpy
+Requires-Dist: pandas
+
+# CI MPM
+Toy repo with some simple functions for the CI lecture
diff --git a/simple_functions/simple_functions.egg-info/SOURCES.txt b/simple_functions/simple_functions.egg-info/SOURCES.txt
new file mode 100644
index 0000000..0ce1f9a
--- /dev/null
+++ b/simple_functions/simple_functions.egg-info/SOURCES.txt
@@ -0,0 +1,10 @@
+README.md
+pyproject.toml
+setup.py
+simple_functions/simple_functions.egg-info/PKG-INFO
+simple_functions/simple_functions.egg-info/SOURCES.txt
+simple_functions/simple_functions.egg-info/dependency_links.txt
+simple_functions/simple_functions.egg-info/requires.txt
+simple_functions/simple_functions.egg-info/top_level.txt
+tests/test_constants.py
+tests/test_simple_functions.py
\ No newline at end of file
diff --git a/simple_functions/simple_functions.egg-info/dependency_links.txt b/simple_functions/simple_functions.egg-info/dependency_links.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/simple_functions/simple_functions.egg-info/dependency_links.txt
@@ -0,0 +1 @@
+
diff --git a/simple_functions/simple_functions.egg-info/requires.txt b/simple_functions/simple_functions.egg-info/requires.txt
new file mode 100644
index 0000000..5da331c
--- /dev/null
+++ b/simple_functions/simple_functions.egg-info/requires.txt
@@ -0,0 +1,2 @@
+numpy
+pandas
diff --git a/simple_functions/simple_functions.egg-info/top_level.txt b/simple_functions/simple_functions.egg-info/top_level.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/simple_functions/simple_functions.egg-info/top_level.txt
@@ -0,0 +1 @@
+
diff --git a/tests/__pycache__/test_constants.cpython-312-pytest-8.3.3.pyc b/tests/__pycache__/test_constants.cpython-312-pytest-8.3.3.pyc
new file mode 100644
index 0000000..c45dde0
Binary files /dev/null and b/tests/__pycache__/test_constants.cpython-312-pytest-8.3.3.pyc differ
diff --git a/tests/__pycache__/test_simple_functions.cpython-312-pytest-8.3.3.pyc b/tests/__pycache__/test_simple_functions.cpython-312-pytest-8.3.3.pyc
new file mode 100644
index 0000000..eb8ab2c
Binary files /dev/null and b/tests/__pycache__/test_simple_functions.cpython-312-pytest-8.3.3.pyc differ
diff --git a/tests/test_constants.py b/tests/test_constants.py
new file mode 100644
index 0000000..0652916
--- /dev/null
+++ b/tests/test_constants.py
@@ -0,0 +1,13 @@
+import numpy as np
+import pytest
+
+from simple_functions import pi
+
+
+class TestPi(object):
+    '''Class to test our constants are computed correctly'''
+
+    def test_pi(self):
+        '''Test computation of pi'''
+        my_pi = pi(2)
+        assert np.isclose(my_pi, np.pi, atol=1e-12)
\ No newline at end of file
diff --git a/tests/test_simple_functions.py b/tests/test_simple_functions.py
index 5a03b52..1b201f5 100644
--- a/tests/test_simple_functions.py
+++ b/tests/test_simple_functions.py
@@ -13,4 +13,4 @@ class TestSimpleFunctions(object):
     def test_my_add(self, iterable, expected):
         '''Test our add function'''
         isum = my_sum(iterable)
-        assert isum == expected
+        assert isum == expected
\ No newline at end of file